{
  "type": "forestry:fabricator_smelting",
  "melting": 3000,
  "product": {
    "Amount": 1000,
    "FluidName": "forestry:glass"
  },
  "resource": [
    {
      "item": "minecraft:sand"
    },
    {
      "item": "minecraft:red_sand"
    }
  ]
}